Simple, rapid and efficient transformation of genotype Nisqually-1: a basic tool for the first sequenced model tree

Area of Science:

• Plant Biotechnology
• Molecular Biology
• Genetics

Background:

• Nisqually-1 is a key model woody plant with a well-annotated genome.
• Establishing a simple and rapid transformation protocol for Nisqually-1 is crucial for genetic studies.

Purpose of the Study:

• To develop a novel and efficient shoot regeneration and Agrobacterium-mediated transformation method for the Nisqually-1 woody plant model.

Main Methods:

• Optimized shoot regeneration medium (SRM) using specific plant growth regulators.
• Agrobacterium-mediated transformation of stem explants using the pBI121 vector with GUS reporter gene.
• Optimized Agrobacterium infection parameters, co-cultivation duration, and acetosyringone concentration.

Main Results:

• Rapid shoot regeneration observed within two weeks from leaf petiole and stem segment explants.
• Achieved an average transformation efficiency of 26.7% for GUS-positive Nisqually-1 plantlets within two months.
• Confirmed successful integration of the foreign GUS gene using Southern blot and GUS activity staining.

Conclusions:

• A novel, rapid, efficient, and simple transformation system for Nisqually-1 has been established.
• This method significantly enhances genetic applications for this important model woody plant.
• The developed protocol facilitates further research and genetic manipulation in Nisqually-1.